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026-Catagory-NSString
#import
#import @interface NSString (JFMessage)/**
*返回聊天信息文本的宽高
*/
+ (CGSize)sizeWithString:(NSString*)str andFont:(UIFont*)font andMaxSize:(CGSize)size;
/**
*将毫秒转换成日期
*/
+ (NSString *)getShowDateWithTime:(NSString *)time;
@end
#import "NSString+JFString.h"@implementation NSString (JFMessage)+ (CGSize)sizeWithString:(NSString*)str andFont:(UIFont*)font andMaxSize:(CGSize)size {
NSDictionary*attrs =@{NSFontAttributeName: font};
return [str boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:attrscontext:nil].size;
}+ (NSString *)getShowDateWithTime:(NSString *)time {
/**
传入时间转NSDate类型
*/
NSDate *timeDate = [[NSDate alloc]initWithTimeIntervalSince1970:[time longLongValue]/1000.0];
/**
初始化并定义Formatter:returns: NSDate
*/
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy-MM-dd HH:mm";
/**
*使用Formatter格式化时间（传入时间和当前时间）为NSString
*/
NSString *timeStr = [dateFormatter stringFromDate:timeDate];
NSString *nowDateStr = [dateFormatter stringFromDate:[NSDate date]];
/**
*判断前四位是不是本年，不是本年直接返回完整时间
*/
if ([[timeStr substringWithRange:NSMakeRange(0, 4)] rangeOfString:[nowDateStr substringWithRange:NSMakeRange(0, 4)]].location == NSNotFound) {
return timeStr;
}else{
/**
*判断是不是本天，是本天返回HH:mm,不是返回MM-dd HH:mm
*/
if ([[timeStr substringWithRange:NSMakeRange(5, 5)] rangeOfString:[nowDateStr substringWithRange:NSMakeRange(5, 5)]].location != NSNotFound) {
return [timeStr substringWithRange:NSMakeRange(11, 5)];
}else{
return [timeStr substringWithRange:NSMakeRange(5, 11)];
}
}
}@end
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